Building a BrachioGraph

A BrachioGraph is a simple pen plotter for the Raspberry Pi which can be built very cheaply. For full details and software visit brachiograph.art
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[@joannaevans]

Thanks for the servo recommendations. I started with the towerpro (confident they are genuine), but they were a little twitchy and after a few hours started making huge jumps constantly. I couldn't even get it to draw a line. I replaced them with some ES08MAii servos and it makes a huge difference.

[@alexanderwolf1151]

Thank you for pointing out the different qualities of servo motors. My spasmodic twitching cheap servos have produced only "very modern art". After I bought the servos you recommended, the BrachioGraph runs super well!

[@francoissaint-jean6129]

Thanks man, I looked everywhere for this

[@the_corgster]

If my bread board has two missing holes, one in the 5 volts group, and one in the 0 volts group, could I use a male wire to allow the pi’s fans to work?

[@olestampevestergaard4746]

I wonder what it would take to make a higher quality brachiograph, one that could "draw straighter" without all the wiggle

[@lephi1240]

Hello Rob, I have some questions
1. Can I change Rasberry Pi to Arduino? (Rasberry is very expensive)
2. If I change servo Emax by servo digital, the machine will draw better?

[@ollie-d]

Pi Zeros are $5 which is cheaper than a knockoff Uno. You could definitely write your own code for an Arduino version. If you can get the movements in GCode you can use an existing library to get this working no problem.

[@srivatsanparthasarathy1039]

What is the quality of printing of text using this. Is it good ?

[@_DarkKnight]

hello sir, Can you please tell me how to plot an image??
I get this error
BrachioGraph.plot_file("images/africa.json")
Traceback (most recent call last):
File "", line 1, in
File "/home/jenish/BrachioGraph/@t", line 155, in plot_file
wait = wait or self.wait
AttributeError: 'str' object has no attribute 'wait'

[@vincenthe7005]

good luck bro

[@francoissaint-jean6129]

Hi, sorry to bother you but is it possible to make a video explaining how to set up the code please?
I seem to be unable to install the libraries therefore I cannot continue the project. Thank you for reading this :)

[@marcv610]

You can watch the pycon UK presentation, ill link it in another reply

[@marcv610]

ruclips.net/video/u4Jh1daCl60/видео.html

[@samn4718]

I'm also unable to install the libraries. Unable to install requirements.txt. Where you able to get this project up and running?

[@the_corgster]

yes i need the exact same help

[@bapisaha3990]

What software is used ?

[@stanTrX]

Does it also work using pc+arduino?